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Miller Engineer Study > Building Construction/Roof Ops > Flashcards

Building Construction/Roof Ops Flashcards

1
Q

Rafters run ______ to beams on a lightweight panelized

A

Parallel

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2
Q

Purlins run _______ to beams and rafters

A

Perpendicular

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3
Q

How far apart are purlins on lightweight panelized?

A

8’

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4
Q

What are the dimensions of purlins?

A

4” x 12”

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5
Q

What are the dimensions of beams on lightweight panelized?

A

6” x 36”

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6
Q

How far apart are beams on a panelized??

A

12’ to 40’

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7
Q

If leading roof op as engineer, order to ascend ladder and travel?

A
  1. Engineer
  2. Most experienced FF
  3. Least experienced FF
  4. Captain
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8
Q

Smoke condition 4 factors?

A

Volume, velocity, density, color

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9
Q

What is the difference between an arched rib and an arched truss?

A
  • Arch rib = rafters on top of arch
  • Arch truss = rafters on hangers
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10
Q

Does a bowstring roof have truss construction?

A

No, just bowstring and arch

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11
Q

3 main eras of building construction?

A
  1. Pre-33
  2. 1933-1950
  3. 1950- present
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12
Q

Pre 33s have _____ roofs and ______ walls

A

Strong roofs

Weak walls
(Unreinforced masonry)

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13
Q

Signs of a Pre-33 building?

A
  • Brick/Kings-row
  • In-line windows
  • Inset windows
  • Balloon Frame
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14
Q

1933-1950 strengths:

A
  • Strong roof
  • Strong walls
  • Conventional lumber
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15
Q

1950s and newer have ____ walls but ______ roofs

A

Strong walls but weak roofs

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16
Q

When would you do an inspection cut on a residential roof?

A

Lightweight residential, checking for gusset plates

17
Q

Offensive vs. Defensive strip

A

Offensive- strip on the involved unit

Defensive- strip behind the fire wall of the involved unit to save the adjacent unit

18
Q

When to do inspection cuts?

A
  • Flat roofs
  • Change of elevation
  • Cross a fire wall
  • Change of construction direction
  • Change of elevation
19
Q

What are you looking for with an inspection cut?

A
  • Lumber size
  • Lumber direction
  • Roof material/decking
  • Lightweight construction/gussets
  • Attic space/attic involvement
20
Q

Commercial/apartment fire 1st truck ladders?

A
  • Aerial uninvolved to involved
  • Ground ladder closer to fire
21
Q

Commercial/apartment fire 2nd truck ladders?

A
  • Back up aerial ladder
  • Emergency bail out ground ladders
  • Ground ladders to back-up/reinforce aerials
22
Q

How often should you traditionally place smoke indicators?

A

Every 10’

23
Q

What’s the strong part of a Lamella roof?

A

Outer perimeter

24
Q

Concern with Lamella roofs?

A

Domino effect if roof failure

Use extreme caution if heavy fire conditions

25
Q

Type 1 construction?

A

Fire resistive

(Steel coated, concrete)
(Jails, hospitals, schools, high-rise)

26
Q

Type 2 construction?

A

Noncombustible

(Uncoated steel/steel frames)

Metal floors/roof with concrete tilt up walls

27
Q

Type 3 construction

A

Non-combustible walls/roof, normal contents on the insides

(Most businesses, strip malls)

28
Q

Type 4 construction?

A

Heavy Timber

(Churches, factories, cabins)
No void spaces, wood minimum 8” thick

29
Q

Type 5 construction?

A

Wood frame

Houses

30
Q

How are I Beam, bar joist/open web joist roofs constructed?

A

Large beams perpendicular to chorded trusses either with wood or metal bars.

Lightweight and can fail easy

Don’t always have beams if small building

31
Q

Conventional flat construction?

A

Large beams with large rafters running perpendicular, usually 2 x 12” minimum

32
Q

Arched roof operations?

A
  1. Ladder uninvolved to involved
  2. Try to exit onto Jack Bay
  3. Inspection cut where Jack Bay meets the arches to determine what kind of arched roof
  4. Strong roof so ventilate over the fire
  5. Consider 1 bay back if bowstring, and use extreme caution
  6. Try to work off of an arch
  7. Strip along the arch if needed
  8. Consider pull back style cut if it has 1 x 6” sheeting, use caution to not fall thru
33
Q

Is a strip mall typically lightweight or conventional?

A

Lightweight

34
Q

Concerns of strip malls

A

Mansards, facades, parapets, common attics, lightweight construction

35
Q

Considerations for aerial ladder on a strip mall?

A
  • Uninvolved to involved
  • If defensive, where’s the most building to save?
  • Ladder B,C, or D sides to avoid mansards and parapets
  • Don’t ladder over involved unit if lightweight

Miller Engineer Study (11 decks)

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